Charles n



(ro Model.) y

'0. N.'VITTUM.

` LOOK* Patented Oct. 2, 1,894.

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W/ TNESSE S.'

ATTORNEY.

UNITED vSrlyrEs' PATENT OE-FICE.

CHARLES N. VITTUM, or MEREDITH, NEW HAMPSHIRE.

L ooK.

srncrFIcATroN forming part of Letters Patent No. 526,878, dated october 2, 1894. Application filed June 4,1891. -Serial No. 395,164. (No model.) I

To all whom it may concern:

Be it known that I, CHARLES N. VITTUM, of Meredith, in thecounty of Belknap and State of New Hampshire, have invented a new and useful Lock, of which the following is a specification.

My invention relates to improvements in locks used for fastening doors, lids, trunks,

chests, and the like, in which bolts and.,

tumblers are used, and the objects of my improvements are, first, to produce alock to which it will be more difficult to fit a key than it is to the boltand tumbler locks now in use, thereby rendering a lock having my improvements less likely to be picked by means of a false or skeleton key, wire, nail, or by any otherdevice, and therefore more secure; second, to produce a superior lock that can be manufactured and sold at a low price, and which will not be complicated or` be likely to get out of repair, and that will be. a durable and safe lock; and, third, to proffI duce a lock in which both the bolt and the tumblers can be co-operatively and `practi cally simultaneouslylocked. I attain these pin 1o, and the key hole K, are Well known and` understood.

Fig. 2 is a longitudinal section and edge view of Fig.l 1, cut through the key hole K, showing a position of three tumblers C, E, and D, in relation to the bolt B, and the spring s s s.

Fig. 3 is the same as Fig. l, showing a plan of improved tumbler D with its arm Z, recess j and spring s; also the lever F, with its lever-arms a: and y, the springt and stop pin n, in position when the bolt B is thrown out, the dotted lines ff and fff showing the position of the lever F and the tumbler D when the key has made very nearly one fourth of a revolution and just before moving the bolt B back into the lock case, which is accomplished by the remainder of its half therein.

revolution, the key making but half a revolution to throw the bolt out 'of the lock case ,or to move it in.

Fig. 4 is an edge view of Fig. 3, cut through the hole for the pivot pin a 'of the lever F, showing the bolt B, tumblers C, E and D, and

Ithe lever F with its spring t.

Fig. 5 is a cross section of tumbler D, cut

through `the hole for the pivot pin p, showing the recess j in the arm of said tumbler. i Fig.`6 is a plan' of a'blind tumbler E, showfast thereon, as shown at d in said figures,

over which the recesses Tof the various tumblers work. See said Figs. l and 3. I next vmake and fit my improved tumbler, as shown at D, in Fig. 3, consisting of the body of a tumbler of ordinary form and shape, as shown at C, Fig.`1, having therein a'recess r tted to the post d of the lbolt B, and also a hole drilled near the end to fit the post p on which and retain said tumbler in position I make and secure to its endv a spring, as shown by 8 8,'in Figs. l and 3, the other end of said spring pressing and working against post e cast or secured in the lock case. The locking lever F is drilled to fit and swivel on post a of the lock case A, the end of said lever being of such length and size as to enter slot j of the arm Z of tumbler D when the boltB is drawn into the lock case, the length of said arm a: to be such as to reach and stop against the arm Z of the tumbler D when the bolt B is thrown out of the lock case, for the purpose of locking the bolt and the tumbler, or tumblers used in connection therewith. The other endy of the lever F, I make of such form, shape and length, see Fig. 3, as to be acted upon by one of the blades of the double- IOO Y biaded `key shown in Fig. 7, the key' sufriciently depressing said end y of the lever F to rock said lever F on pivot a enough to raise the opposite end, or arm m, to the right position to allow the slot j of arm Z of tumbler D, see Fig. 3, to pass over `it when the said tumbler D is being raised to allow the post of bolt B to slide back into recess fr of tumbler D when bolt B is being drawn back into the lock case.

I place a posta inthelock case for the arm y of lever F to strike and stop against, and

to force said arm y against said post n, and

' bler D above described, and their addition is for the purpose of complicatingand thereby making the lock more secure. It is obvious, therefore, that as `many of these auxiliary tumblers may be added as is desired or they may be wholly dispensed with and the improved tumbler be alone used, or two or more of the improved tumblers may be combined in a lock, and it is alsoobvious that they may be placed in any position with reference to each other and to the bolt that may be deemed desirable.

The key to my improved lock is doublebladed,having a blade on each opposite side of the stem, as shown in Fig. 7. A y

To operate my improved lock, first throw the bolt out of the case, as shown in Fig. 3. Then take a double-bladed blank key, see Fig. 7, and [it one of its blades so that it will engage and depress the arm y of lever` F sufficiently to raise the arm of said lever to the right position to allow the recess j of arm Z of tumbler D to pass over it when the tumbler D is being raised to allow the bolt to slide back into the lock case; that is, to the position shown by the dotted lines ff in said Fig. 3. I then t the other blade of the key to the improved tumbler so that, as soon as said .lever is in said position, it will begin to operate upon said tumbler by caus-` ing the body of the same to tilt upward and the recessj of its arm Z to pass over the` arm a; of the lever F, said blade being notched ori grooved, see Fig. 7, to just the right depth to cause said upward motion to continue until said improved tumbler D has been carried to the position shown by the dottedli'nefff, care being observed at all times to keep said blade of such general form and shape as to properly operate the bolt when the tumblers have been brought into such a position as to allow the bolt to be moved into the lock. When `other tumblers are used in combination with the improved tumblerfor the purpose of complicating the lock, it is perfectly obvious that the key must be so fitted, by cutting or iilling, as to properly operate them in conjunction with the improved tumbler, the object being `to bring the recesses i', of the various tumblers into direct line with each other, and into line with the recess a", of tu mbler D when it is in the position shown by the dotted line f f f', in order to allow the bolt to slide back into the lock. The key is iitted to each tumbler separately and the process of fitting is the same, or nearly so, in each case. By observing the action of the key, it will be seen that its operation upon the locking device of the tumbler D and upon the locking device of the bolt B, (that is, upon the lever F, and the various tumblers) is continuous and substantially simultaneous.

What I claim, and desire to secure by Letters Patent of the United States, is

1. In a lock, the combination with the lockcase, of a suitable bolt, a tumbler D, provided `with its recess r, pin-hole 19, spring s and `arm Z, in which is notched or grooved the lrecess j, the lever F provided with a post- `hole a,a spring t and lever arms and y, and

independent means, consisting of the double-` bitted key, for operating said bolt, lever and tumbler, substantially as described.

2. In a lock, the combination with the lockcase, of a suitable bolt, a tumbler provided with a recess so constructed as to allow the bolt to be projected and withdrawn and to lock the same when it is in a projected posi-4 tion, and an arm projected from the body of the tumbler and adapted to be engaged by the lever, or dogV F, one or more of the common tumblers C and E, for the purpose of complicating the lock, the lever F to engage the arm of the tumbler D and prevent the movement of said tumbler when the bolt is in a projected position, and independent means, consisting of the` double-bitted-key, for operating the bolt, lever and tumblers, substantially as described.

` CHARLES N. VITTUM. Witnesses:

T. W. THOMPSON,

WM. N. MCNAMARA..

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